Retimere styrker signalintegriteten i AI datacentre

Microchip lancerer XpressConnect PCIe 6.0 and CXL 3.1 retimere, der adresserer forsinkelser og signalintegritets-udfordringer i AI datacentre (in english).

As AI workloads continue to scale, data center architects are increasingly constrained by limited signal reach and rising latency, which can leave valuable memory resources underutilized across large GPU clusters. 

These challenges are amplified as interconnect speeds increase. At 64 GT/s (giga transfers per second), signal integrity limitations can restrict system scale and burden server architectures. In response, Microchip Technology has released XpressConnect PCIe 6.0 and CXL 3.1 retimers to enable memory expansion and resource disaggregation in large-scale AI fabrics.

The retimers are designed to extend signal reach beyond conventional PCIe Gen 5 and Gen 6 electrical limits, enabling more flexible system designs across complex baseboards, riser cards and cabled interconnects. 

The retimers are engineered to help address these challenges by enabling higher bandwidth connectivity while supporting the stringent thermal and power budgets required in modern AI fabrics. 

XpressConnect retimers achieve a pin to pin latency of less than 12 ns, approximately 80% lower than PCIe 6.0 specifications. This low latency performance helps improve utilization of AI accelerators and GPUs by reducing data stalls in high density AI clusters.

- AI data centers are increasingly constrained not by compute, but by the ability to move data efficiently across the system. As PCIe 6.0 pushes speeds to 64 GT/s, signal reach and latency become critical design challenges, says Brian McCarson, corporate vice president and GM of Microchip’s data center solutions business unit.

Engineered as an industry standard, drop in solution, XpressConnect retimers are designed to help reduce the risk of single vendor dependency for hyperscalers. 

Additionally, the devices support flexible link bifurcation configurations (1×16, 2×8 and 4×4) and align with widely adopted retimer footprint guidelines, while providing enterprise class features such as hot plug support and end to end data integrity.